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dc.contributor.author
Ocsachoque, Marco Antonio  
dc.contributor.author
Eugenio Russman, Juan I.  
dc.contributor.author
Irigoyen, Beatriz del Luján  
dc.contributor.author
Gazzoli, Delia  
dc.contributor.author
Gónzalez, María Gloria  
dc.date.available
2018-03-26T20:21:05Z  
dc.date.issued
2016-04  
dc.identifier.citation
Ocsachoque, Marco Antonio; Eugenio Russman, Juan I.; Irigoyen, Beatriz del Luján; Gazzoli, Delia; Gónzalez, María Gloria; Experimental and theoretical study about sulfur deactivation of Ni/ CeO2 and Rh/CeO2 catalysts; Elsevier Science Sa; Materials Chemistry and Physics; 172; 4-2016; 69-76  
dc.identifier.issn
0254-0584  
dc.identifier.uri
http://hdl.handle.net/11336/40025  
dc.description.abstract
Sulfur deactivation of Ni/CeO2 and Rh/CeO2 catalysts were examined through an experimental and theoretical study. These catalysts were characterized by N2 adsorption, X-ray diffraction, temperature programmed reaction, thermogravimetric analysis, Uv-visible spectroscopy and Raman spectroscopy, and tested under the methane dry reforming reaction in the presence of H2S. On the other hand, different possible interactions of sulfur with Rh, Ni or surface sites of the CeO2 support were evaluated by performing energy calculations with the density functional theory (DFT). Overall, the results indicate that tolerance to sulfur of Rh/CeO2 catalyst is higher than that of Ni/CeO2 one. In this sense, TPR measurements show that reduction of CeO2 is promoted by the presence of Rh. This effect, probably caused by hydrogen spillover to CeO2 support during the reduction of RhOx species, could be linked to a high oxygen donation capacity of Rh/CeO2 catalysts. Accordingly, the O2- species existing on Rh/CeO2 catalysts, revealed by Raman spectra of these samples, could favor sulfur oxidation and prevent Rh-S interactions. Likewise, the theoretical calculations show that desorption of S-O species from Rh/CeO2 system is more favorable than that from Ni/CeO2 one. Therefore, our experimental and theoretical study about sulfur deactivation of Ni and Rh supported on CeO2 allow us to postulate that Rh can help to desorb SOx species formed on the support, retarding sulfur poisoning of the Rh/CeO2 catalysts.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science Sa  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Computer Modeling And Simulation  
dc.subject
Oxides  
dc.subject
Raman Spectroscopy And Scattering  
dc.subject
Surface Properties  
dc.subject.classification
Recubrimientos y Películas  
dc.subject.classification
Ingeniería de los Materiales  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Experimental and theoretical study about sulfur deactivation of Ni/ CeO2 and Rh/CeO2 catalysts  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-03-26T18:07:44Z  
dc.journal.volume
172  
dc.journal.pagination
69-76  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Ocsachoque, Marco Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina  
dc.description.fil
Fil: Eugenio Russman, Juan I.. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina  
dc.description.fil
Fil: Irigoyen, Beatriz del Luján. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles. Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías del Hidrogeno y Energias Sostenibles; Argentina  
dc.description.fil
Fil: Gazzoli, Delia. Instituto de Investigaciones Universitarias Roma la Sapienza; Italia  
dc.description.fil
Fil: Gónzalez, María Gloria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina  
dc.journal.title
Materials Chemistry and Physics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.matchemphys.2015.12.062  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058415305381